| Brandsoft Solutions Limited | Information & communication | 2000 |
| Brandy Care Limited | Health & social care | 2016 |
| Branksome Mews Maintenance Limited | Households | 1972 |
| Brannon Civils Ltd | Construction | 2018 |
| Brantano Retail Limited | Wholesale & retail | 2016 |
| Branton 2 Ltd | Construction | 2025 |
| Branton Court Stables Limited | Professional & scientific | 2014 |
| Branwell HC Limited | Financial services | 2021 |
| Brasa DA Azinhaga Limited | Hospitality | 2025 |
| Brasil&Burgers Limited | Hospitality | 2020 |
| Brass Castle LLP | | 2016 |
| Brass Cat (Yorkshire) Limited | Financial services | 2023 |
| Brass Tax Accounting Limited | Professional & scientific | 2014 |
| Brave Words CIC | Arts & recreation | 2018 |
| Bravomax Healthcare Ltd | Administrative & support | 2017 |
| Brawl Agency Group Limited | Information & communication | 2021 |
| Brawl Limited | Information & communication | 1998 |
| Braynex Services Ltd | Wholesale & retail | 2026 |
| Braywood Property Investments Ltd | Real estate | 2025 |
| Brazi&Franz Limited | Construction | 2024 |
| Brazier Consulting Services Ltd | Administrative & support | 2016 |
| BRB Private Limited | Wholesale & retail | 2024 |
| Brclish Entreprise Ltd | Administrative & support | 2020 |
| Bread & Butter Learning Solutions Limited | Education | 2023 |
| Breadandbakes Ltd | Wholesale & retail | 2025 |
| Break Poverty Cycle International | Administrative & support | 2018 |
| Breakin Escape Rooms Limited | Arts & recreation | 2016 |
| Breakthrough Associates Ltd | Administrative & support | 2018 |
| Breakthrough Concepts Limited | Professional & scientific | 2014 |
| Breamwood Ltd | Real estate | 2023 |
| Brearley Contracting Limited | Construction | 2020 |
| Brearley Plumbing and Heating Services Ltd | Construction | 2022 |
| Breast Surgery Clinic Limited | Health & social care | 2014 |
| Breath and Balance Limited | Wholesale & retail | 2024 |
| Breathe & Co (Leeds) Ltd | Hospitality | 2025 |
| Breathe Creations Ltd | Wholesale & retail | 2023 |
| Brecks Contracting Services Limited | Construction | 2009 |
| Brecks Farm Limited | Agriculture & fishing | 1978 |
| Brecks Holdings (Yorkshire) Ltd | Financial services | 2020 |
| Breen Installations Limited | Construction | 2022 |
| Breeze Aviation Limited | Transport & logistics | 2008 |
| Breeze Aviation Services Ltd | Arts & recreation | 2018 |
| Breezia Ltd | Wholesale & retail | 2025 |
| Brengor Innovation Ltd | Manufacturing | 2018 |
| Brenika Engineering Services Ltd | Professional & scientific | 2025 |
| Brenmore Electrical Limited | Construction | 2003 |
| Brennan Express Haulage Limited | Transport & logistics | 2005 |
| Brennan Rentals Limited | Real estate | 2026 |
| Brennan Woodworking Ltd | Manufacturing | 2023 |
| Brenntag Colours Limited | Professional & scientific | 2001 |
| Brenntag Inorganic Chemicals Limited | Professional & scientific | 1967 |
| Brenntag UK Holding Limited | Professional & scientific | 2006 |
| Brenntag UK Limited | Manufacturing | 2004 |
| Brenter Ltd | Construction | 2024 |
| Brentwood Design LLP | | 2012 |
| Brentwood Group Limited | Professional & scientific | 2018 |
| Bresa Properties Ltd | Real estate | 2025 |
| Breton Shirt Company Limited | Wholesale & retail | 2015 |
| Brettargh Gate Ltd | Hospitality | 2025 |
| Brew House & Co Limited | Wholesale & retail | 2014 |
| Brew Leeds Ltd | Hospitality | 2025 |
| Brewbaker Engineering Limited | Professional & scientific | 2014 |
| Brewbox Delivery Limited | Wholesale & retail | 2022 |
| Brewer Consultancy Limited | Administrative & support | 2013 |
| Brewery Customs Clearance Ltd | Transport & logistics | 2020 |
| Brewery Wharf Management Limited | Administrative & support | 2002 |
| Brewology Support Services Limited | Administrative & support | 2020 |
| Brewster BYE Architects Limited | Professional & scientific | 1999 |
| Brewtique Group Ltd | Wholesale & retail | 2025 |
| Brexco Ltd | Wholesale & retail | 2015 |
| Brian Cooper Surfacing Limited | Construction | 2022 |
| Brian Jackson Decorators Holdings Limited | Financial services | 2023 |
| Brian Jackson Decorators Limited | Construction | 2017 |
| Brian Lightowler Transport Limited | Transport & logistics | 2020 |
| Brian Rook (Builders) Limited | Construction | 1985 |
| Brian S. Thomas Limited | Wholesale & retail | 1972 |
| Brian Walker Electrical Contractors Limited | Construction | 2005 |
| Briana Ltd | Transport & logistics | 2022 |
| Briar & Bramble Wildlife Conservation CIC | Agriculture & fishing | 2025 |
| Briarfield Limited | Information & communication | 2004 |
| Briarlea Property Limited | Real estate | 2025 |
| Brick and Equity Ltd | Transport & logistics | 2025 |
| Brick Hive Limited | Real estate | 2017 |
| Brick-Lock Limited | Construction | 1991 |
| Brick-Tie EOT Limited | Financial services | 2022 |
| Brick-Tie Limited | Construction | 1986 |
| Brickbybrick Yorkshire Ltd | Construction | 2024 |
| Brickfield Health Services Ltd | Health & social care | 2022 |
| Brickhouse Surveys Limited | Professional & scientific | 2026 |
| Brickmouse Ltd | Information & communication | 2024 |
| Bricky Master PI Limited | Wholesale & retail | 2023 |
| Bridal Apparel Leeds Limited | Wholesale & retail | 2011 |
| Briden Ltd | Financial services | 2016 |
| Brides UP North Limited | Extraterritorial | 2024 |
| Bridgcap Holdings Ltd | Financial services | 2020 |
| Bridge 3 LLP | | 2009 |
| Bridge Acre Nurseries Ltd | Real estate | 2020 |
| Bridge Block Services Ltd | Households | 2026 |
| Bridge Cleaning Services Ltd | Construction | 2019 |
| Bridge Contract Solutions (WM) Ltd | Administrative & support | 2016 |